Donald Trump has called Monday's deadly strike on a Berlin Christmas market 'an attack on humanity,' saying Wednesday that the rise of Islamic terrorism in the West 'is disgraceful.' 'It's an attack on humanity. That's what it is,' Trump said outside his Mar-a-Lago resort in Palm Beach, Florida. 'An attack on humanity. And it's got to be stopped.'

Trump said he hasn't spoken with President Obama since the Berlin attack and the assassination of a Russian diplomat by a Turkish Islamic militant in Ankara.

'I have not,' he said. 'Two days ago, but not since.'

In Berlin, the still-at-large driver of a truck plowed down killed 12 people and wounded 48 as he slammed his vehicle into pedestrian traffic.

A pool reporter asked Trump whether the week's bloodshed has returned his thinking to campaign pledges about banning Muslims from emigrating to the U.S. and resurrecting a post-9/11-era registry of foreign nationals from terror-prone Muslim countries.